A jar contains 5 red marbles, numbered 1 to 5, and 7 blue marbles numbered 1 to 7. Find the following probabilities. Round solutions to three decimal places, if necessary. a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 3 on it? P(3 | red) b) The first marble is replaced, and another marble is chosen at random. If you're told the marble has the number 1 on it, what is the probability the marble is red? P(red | 1)=